Rac and logical dataguard Oracle9i

CAn anyone help me regarding implimentation of RAC on logical dataguard . We are using Oracle 9i
and our OS is redhat AS 3.
I need some document explaining the same and also its implimentaion .
Its urgent if someone can help
THANKS

Well,
1)This book contains detailed information on preparing physical/logical standby database in a RAC environment.
See more details on
http://www.rampant-books.com/book_2004_2_dataguard.htm
2) Architecture information
http://www.dell.com/downloads/global/power/ps2q05-20040265-Rad.pdf
3) and see if this adds any information in your case
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96653/concepts.htm
Thanks

Similar Messages

Import in logical dataguard oracle9i

I need to know will import work in logical dataguard oracle 9i.
If i import a tablespace or a table will that be reflected in the secondary database.
Bcz i tried importing a table and that was not reflected in my secondary server.
How can we check that a particular object is under dataguard and which object is not .
thanks

Well,
1)This book contains detailed information on preparing physical/logical standby database in a RAC environment.
See more details on
http://www.rampant-books.com/book_2004_2_dataguard.htm
2) Architecture information
http://www.dell.com/downloads/global/power/ps2q05-20040265-Rad.pdf
3) and see if this adds any information in your case
http://download-west.oracle.com/docs/cd/B10501_01/server.920/a96653/concepts.htm
Thanks

RAC and dataguard

With reference to this thread
is Dataguard and standby dbs is HA
RAC and DATAGAURD are two different approches for high availability and desaster recovery.
We are planning to implememt RAC and DATAGAURD but there are budget issues also.
With RAC As i understand we have multiple instances governing a single database. So multiple node/machines governing a single database server.
With DATAGAURD,we have a DR solution at another location.If the primary server fails,standby database takes up the role of primary.
With RAC alone,if any node fails, there is another node to do instance recovery or the server still continues. But what if database server crashes. WIth RAC alone and no dataguard, won't it allow downtime?

Hi Hashmi,
RAC and DataGuard are indeed different things, as you understood.
Regarding your question, there is no database server, that's the whole thing. There is one database (which resides on external redundant storage like Netapp, EMC, etc.) and there are several servers that are running the instances. Downtime will occur only if the storage crashes. And if you don't trust your storage you can have ASM redundancy, so storage failure will not cause downtime as well.
The down side, is that there is one database, so if you have logical corruption, human error, or something similar you can loose data or have downtime.
However, the high availability is real.
In DataGuard, once the primary is down it takes some time (not long) to activate the standby, but it has a different IP, so you should configure your DNS/clients (in advance or at failover) to connect to the activated standby.
HTH
Liron Amitzi
Senior DBA consultant
[www.dbsnaps.com]

Tnsnames configuration for RAC and dataguard

Hi everyone,
I have an environment with RAC and dataguard (production is RAC, standby is single instance) and I was wondering what is the best way to configure the clients (since I have quite a few and I don't want to change their tnsnames if I need to failover to the standby database).
Now, I need to have both RAC nodes of course, the question is what I should do with the standby...
The problems are:
1. If I add the standby as another address, 1/3 of the connections will get to it and I don't think it's a good idea
2. I can disable the load_balance, but then all connections will go to the first node's listener
3. After a failover, if the RAC nodes are down, it will take a long time to connect (the servers will not respond and the client will wait for timeout if it tries to connect to the RAC nodes first, only after the timeout it will try the standby and succeed)
Any ideas and suggestions will be appreciated.
Thanks,
Liron

Hi Robert,
I agree that the standby should be up, but you have to admit that if it is down it should not delay connections to the primary...
About the DNS, it's not that I don't trust the SA, but this is an environment for a customer so it should be as independent as it can be. So the failover process will be easy and fast. I don't know if I can get DNS permissions, but that's a good idea...
A question that can be derived from this:
assuming that I use observer to have an automatic failover, how should I configure my TNS? If the standby will become the primary automatically, I have to configure the clients to connect to the activated standby automatically. With no DNS changes or anything manual.
I guess in this case, my best option will be with LOAD_BALANCE=off, some of the clients will have RAC-NODE1 as first address and some will have RAC-NODE2, the standby will be the last address and we'll suffer the timeout if the primary will be down when connecting to the activated standby.
If anyone has other ideas, it would be great.
Thanks,
Liron

Infrastructure suggestion for Oracle RAC and Dataguard

Hello,
We are working on migration business proposal and need to suggest HA and DR infrastructure solution with Oracle 11G databases. I am thinking to suggest Oracle 11g RAC and Dataguard to meet this requirement. We also wanted to cover Dev, Test and Pre Prod along with Prod in new environment. Can someone suggest cost effective, stable and scalable infrastructure for this requirement
Best regards,
Venkat

In terms of cost ? Perhaps.
In terms of performance? NO.
Bear in mind I'm not trying to sell anything here, but in my experience hardly anything matches the performance of Exadata. It has specific features for the DB such as de iDB protocol which enables the offloading of queries to the exadata storage servers. More unique features include: storage indexes, HCC compression, smart flash cache... It's all a matter of how much you want to spend.
Yes, you can have all your servers on the same box if you want, just make sure it is not a single point of failure. (Have appropriate safeguards in place in case of power failure, Data center catastrophes, etc). In case of LPARs on the same box, be aware of one server over-utilizing resources which would affect the other LPARs (configurable).
More info on Exadata: http://www.oracle.com/technetwork/server-storage/engineered-systems/exadata/dbmachine-x3-twp-1867467.pdf
If your company has a tight budget you might also look at your options with Database appliance: http://www.oracle.com/technetwork/server-storage/engineered-systems/database-appliance/documentation/oracle-db-appliance…
Database appliance has more flexibility in terms of licensing and it's also a complete hardware solution from oracle for Databases.
Regards

Logical dataguard problem

Hi all,
I have prepared a logical dataguard on two local systems. My oracle version is 9i and linux version is Entreprise Linux 3.0.
Today when i tried to execute spcreate.sql on the primary database it had thrown some errors in my secondary database.
Kindly look at the following output from my secondary database:-
SQL> select applied_scn,newest_scn from dba_logstdby_progress;
APPLIED_SCN NEWEST_SCN
270084 272644
SQL> SELECT XIDUSN, XIDSLT, XIDSQN FROM DBA_LOGSTDBY_EVENTS
2 WHERE EVENT_TIME = (SELECT MAX(EVENT_TIME) FROM DBA_LOGSTDBY_EVENTS);
XIDUSN XIDSLT XIDSQN
6 1 114
SQL> EXECUTE DBMS_LOGSTDBY.SKIP_TRANSACTION(6,1,114);
PL/SQL procedure successfully completed.
SQL> ALTER DATABASE START LOGICAL STANDBY APPLY;
Database altered.
SQL> select applied_scn,newest_scn from dba_logstdby_progress;
APPLIED_SCN NEWEST_SCN
270087 272644
SQL> SELECT * FROM DBA_LOGSTDBY_EVENTS;
EVENT_TIM CURRENT_SCN COMMIT_SCN XIDUSN XIDSLT XIDSQN
EVENT
STATUS_CODE
STATUS
grant select on STATS$V_$SQLXS to PERFSTAT
942
ORA-00942: table or view does not exist
from the above errors i have found out that a particular transaction is unable to replicate in my standby database and i skipped the transaction. But still after skipping the transaction applied_scn in the dba_logstdby_progress is moving only by 3 each time I skip a transaction . So it won'' t be possible for me to skip each and every transaction.
Kindly let me another way of skipping the rest of transactions which are causing halt in the replication.
Also I am unable to find out how the script executed from the sys user can be replicated on logical database as sys comes in unsupported users in logical datagurad.
Is there any way I can execute a script on primary database which won't reflect on secondary database.
thanks in advance.

Hi Yoann,
Commands you provided for skipping perfstat schema worked on logical database .
Now i m executing spcreate.sql on secondary database it gives following errors after i have specified the perfstat password,default tablespace for perfstat as 'perfstat' and temporary tablespace for perfstat as 'temp' and datafile contained in perfstat tablespace is 150 MB in size.
spcreate worked fine on primary but is giving errors in the end in secondary.Any suggestions about this:-
Specifying the SYSTEM tablespace will result in the installation
FAILING, as using SYSTEM for performance data is not supported.
TABLESPACE_NAME CONTENTS
LOGMNRTS PERMANENT
PERFSTAT PERMANENT
TEMP TEMPORARY
UNDOTBS1 UNDO
Specify PERFSTAT user's default tablespace
Enter value for default_tablespace: perfstat
Using perfstat for the default tablespace
PL/SQL procedure successfully completed.
User altered.
User altered.
Choose the PERFSTAT user's temporary tablespace.
Specifying the SYSTEM tablespace will result in the installation
FAILING, as using SYSTEM for the temporary tablespace is not recommended.
Specify PERFSTAT user's temporary tablespace.
Enter value for temporary_tablespace: temp
Using temp for the temporary tablespace
PL/SQL procedure successfully completed.
User altered.
NOTE:
SPCUSR complete. Please check spcusr.lis for any errors.
SQL>
SQL> --
SQL> -- Build the tables and synonyms
SQL> connect perfstat/&&perfstat_password
Connected.
SQL> @@spctab
SQL> Rem
SQL> Rem $Header: spctab.sql 16-apr-2002.14:54:46 vbarrier Exp $
SQL> Rem
SQL> Rem spctab.sql
SQL> Rem
SQL> Rem Copyright (c) 1999, 2002, Oracle Corporation. All rights reserved.
SQL> Rem
SQL> Rem NAME
SQL> Rem spctab.sql
SQL> Rem
SQL> Rem DESCRIPTION
SQL> Rem SQL*PLUS command file to create tables to hold
SQL> Rem start and end "snapshot" statistical information
SQL> Rem
SQL> Rem NOTES
SQL> Rem Should be run as STATSPACK user, PERFSTAT
SQL> Rem
SQL> Rem MODIFIED (MM/DD/YY)
SQL> Rem vbarrier 03/20/02 - 2143634
SQL> Rem vbarrier 03/05/02 - Segment Statistics
SQL> Rem cdialeri 02/07/02 - 2218573
SQL> Rem cdialeri 01/30/02 - 2184717
SQL> Rem cdialeri 01/11/02 - 9.2 - features 2
SQL> Rem cdialeri 11/30/01 - 9.2 - features 1
SQL> Rem cdialeri 04/22/01 - Undostat changes
SQL> Rem cdialeri 03/02/01 - 9.0
SQL> Rem cdialeri 09/12/00 - sp_1404195
SQL> Rem cdialeri 04/07/00 - 1261813
SQL> Rem cdialeri 03/20/00 - Support for purge
SQL> Rem cdialeri 02/16/00 - 1191805
SQL> Rem cdialeri 01/26/00 - 1169401
SQL> Rem cdialeri 11/01/99 - Enhance, 1059172
SQL> Rem cmlim 07/17/97 - Added STATS$SQLAREA to store top sql stmts
SQL> Rem gwood 10/16/95 - Version to run as sys without using many view s
SQL> Rem cellis.uk 11/15/89 - Created
SQL> Rem
SQL>
SQL> set showmode off echo off;
If this script is automatically called from spcreate (which is
the supported method), all STATSPACK segments will be created in
the PERFSTAT user's default tablespace.
Using perfstat tablespace to store Statspack objects
... Creating STATS$SNAPSHOT_ID Sequence
create sequence STATS$SNAPSHOT_ID
ERROR at line 1:
ORA-01031: insufficient privileges
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production

Separation of the physical and logical structures

Hi,
I am very new to Oracle database administration. While reading Sam Alapati's book "Expert Oracle9i Database Administration," I came across the concept of the separation of an Oracle database’s physical storage structures from its logical storage structures. In particular, Sam states the following in his book:
“This logical defining of Oracle's database structure has another fundamental motive behind it. By organizing space into logical structures and assigning these logical entities to users of the database, Oracle databases achieve the logical separation of users (owners of the database objects, such as tables) of the database from the physical manifestations of the database in terms of data files and so forth.”
I am not quite convinced about the value this separation of the physical and logical really adds to the task of database administration. Considering the way DBASE worked, i.e. each table used to be stored as a separate file, what would be lost if Oracle’s implementation were similar and each table (i.e. file) were to be assigned to a particular user. I am not sure of the value added by storing the data from more than one table in more than one file, effectively resulting in a many-to-many relationship between tables and files. Please enlighten me. I would really appreciate it.
Karim

and each table were to be assigned to a particular user. Don't know what you mean. In Oracle, every table has one and only one owner.
I am not sure of the value added by storing the data from more than one table in more than one fileIf an application has a thousand tables, would you rather manage 1000 files or 1?
In general, separating the physical from the logical allows the physical structure to change without affecting the logical (in theory at least). Even a table is a logical structure. We think of rows and columns, but it isn't stored the way we think of it. When we do a select statement, we don't have to write code to read each block, extract the contents, etc.
With partitioned tables, it is sometimes a good idea to split up partitions in such a way to get a performance gain. Like placing the most recent (and most queried) month of data on the fastest storage device. If you stuffed everything in to one gigantic file, you would lose that ability.
If you want to store each table as a separate file, you can do that with Oracle. For each new table, create a new tablespace, and then create a new file for the tablespace. Then come back to this forum in a year and tell us how it's going.

Database replication between Oracle RAC and Oracle Standalone DB in 9i

Hi,
We have currently 4 node RAC environment and Oracle RAC implementation with 4 Oracle instances. We want to move the one instance and make it Standalone with Oracle database due to availability issue. Thus we will remain with 3 nodes on the RAC database and one Standalone database. We want to implement Oracle replication on this solution, where partial database of RAC environment needs to be replicated to Standalone node.
We will have Oracle 9i database server for both RAC and Standalone machine.
The partial data that we are looking for replication are of size 25GB. Some of questions we have:
1. Is there any other replication mechanism apart from Materilzed view for this solution?
2. Is it feasible to sychronize around 25GB data between servers?
3. What can be estimated time for refresh or Synchronization?
The methods that we are evaluating currently for this replication are:
1. Multi Master replication
2. Oracle 9i Datagaurd.
Please let me know if we need to look for some other methods of replication also.
Thanks in advance for help.

ManojMac wrote:
The partial data that we are looking for replication are of size 25GB. Some of questions we have:
1. Is there any other replication mechanism apart from Materilzed view for this solution?Streams is another option
2. Is it feasible to sychronize around 25GB data between servers?Sure. Depending on the rate of change, your latency requirements, whether the standalone database has the horsepower to apply all the changes generated by to other three nodes, etc.
3. What can be estimated time for refresh or Synchronization?Depends on the architecture, the network connection, whether you are doing incremental refreshes, etc. And it depends on what time you're measuring-- you might be measuring the latency between the RAC cluster and the standalone database, you might be measuring the time it takes to incrementally refresh a single materailized view when there have been no changes, you might be measuring the time it takes to do a complete refresh of an entire refresh group, pulling 25 GB of data over the network.
The methods that we are evaluating currently for this replication are:
1. Multi Master replication
2. Oracle 9i Datagaurd.DataGuard is not an option if you only want to replicate a subset of the data. The two realistic options are materialized views and Streams. Are you anticipating that you will be making changes on both nodes? If not, you can use simple materialized views rather than multi-master replication.
Since 9.2 is not longer covered by Premier Support, are you planning to upgrade to a supported version in the near future? In particular, Streams works a lot better in later versions of the database.
Justin

Logical dataguard SQL apply fails during import on primary database

I have created logical dataguard using GRID, initially every things works fine.
One time we had to do import of new data on primary database, that is where the problem started.
log apply is lagging big time, and i got this error
StatusRedo apply services stopped due to failed transaction (1,33,8478)
ReasonORA-16227: DDL skipped due to missing object
Failed SQLDROP TABLE "USA"."SYS_IMPORT_SCHEMA_01" PURGE
This table exists on logical dataguard...
How do we deal with import on logical dataguard, since import generates a lot of redlogs

Hello;
These Oracle notes might help :
Slow Performance In Logical Standby Database Due To Lots Of Activity On Sys.Aud$ [ID 862173.1]
Oracle10g Data Guard SQL Apply Troubleshooting [ID 312434.1]
Developer and DBA Tips to Optimize SQL Apply [ID 603361.1]
Best Regards
mseberg

Logical DataGuard

Dear Support
I am trying to setup logical dataguard as we dont have licenses for active-active and need to gernerate reports online from the standby database .
always getting error like the primary database cannot connect to standby database ?
Please help.
Thanks
Ehab

user5307432 wrote:
Thankz Mahir
I will try this today..
want to ask u what os the disadvantage using logical datagaurd rather than using active dataguard?
ThanksHi,
Firstly, you can not use Active Data Guard with logical standby. Only can use physical standby.
As you know, transport service is don't support all datatypes (http://docs.oracle.com/cd/B19306_01/server.102/b14239/create_ls.htm#i76902).
But if you are using logical standby, then you can create additional indexes, also you can use logical database as other database
for other schema because logical standby database opening READ/WRITE mode.
Regards
Mahir M. Quluzade

RAC and ASM with geographically seperated disks

We are planning to use RAC and ASM with four nodes. The two nodes will be at one location and another two nodes at different location. The ASM disks also will be available locally. Is it possible to configure ASM with geographycally serepared disks.
We are thinking of two RAC and ASM setups with two nodes each and streams replication between the RACs.
I want to know what is the best method to implement. Is it RAC with four nodes OR two RACs with two nodes each and streams replication between the RACs.

Apart from the latency issue, which has been mentioned by others, you also need to mirror your disks between the two sites and be very careful about split brain scenarios under node or site crashes.
You need to mirror the disks between the sites in case one site crashes completely and loses all network access. The only way the second site can carry on is if it has access to all the data disks, and the cluster control disks (terms vary for this, such as quorum or voting disk). If you do not mirror you simply do not have a resilient design. Resilience is about eliminating all single points of failures, which means duplicating everything i.e. mirroring.
And mirroring between two remote sites adds more volume to the data traffic between the two sites. And it would need to be synchronous rather than asynchronous to guarantee no data loss. And your commits for each transaction would be limited by the round trip time to write to the remote site and get the acknowledgement back.
Split brain is something you need to avoid with remote clusters, and local clusters too. If the network goes down between the two sites and both sites have local copies of all of the data and cluster control disks, which site becomes the primary and which one becomes the standby? You cannot have both sites coming back up as primary with active databases and accepting transactions! At this point you have split brain, and each side is processing transactions independently, and both databases are now deviating from each other with different data changes.
I don't think a 4 node RAC environment split across geographical distances is really viable, except under small transaction volumes, and where response time (transaction time) is not critical. If you have high volumes and need fast transactions then you need to only use local RAC configurations, and replicate between the two sites asynchronously. DataGuard is easier, but you need to decide if you need Streams and how to make it work for you.
John

RAC and Grid Computing

Hi,
I am trying to understand the connection between RAC and Grid Computing.
In RAC, we can have multiple instance of the same physical database and if all these instances are running on n* separate machines then we have n+ set of processes to take care of computation.
Isn't this summarise the Grid computing as well or is it something entirely different. Please share.
Thanks in Advance

Hi,
Billy already answered well.
Litte Note:
Timeline of Oracle Databases:
1992: Oracle version 7 appeared with support for referential integrity, stored procedures and triggers.
1997: Oracle Corporation released version 8, which supported object-oriented development and multimedia applications.
1999: The release of Oracle8i aimed to provide a database inter-operating better with the Internet (the i in the name stands for "Internet"). The Oracle8i database incorporated a native Java virtual machine (Oracle JVM, aka "Aurora").
2001: Oracle9i went into release with 400 new features, including the ability to read and write XML documents. 9i also provided an option for Oracle RAC, or "Real Application Clusters", a computer-cluster database, as a replacement for the Oracle Parallel Server (OPS) option.
2003: Oracle Corporation released Oracle Database 10g, which supported regular expressions. (The g stands for "grid"; emphasizing a marketing thrust of presenting 10g as "grid computing ready".)
2005: Oracle Database 10.2.0.1—aka Oracle Database 10g Release 2 (10gR2)—appeared.
2007: Oracle Corporation released Oracle Database 11g for Linux and for Microsoft Windows.
Future (*Just a guess*): Oracle Database will release version 12c. (The c stands for "cloud"; emphasizing a marketing thrust of presenting 12c as "Cloud Computing ready".)
Oracle has released products with "C" of the "Cloud" (e.g Oracle Enterprise Manager 12c)
http://en.wikipedia.org/wiki/Oracle_Database
Regards,
Levi Pereira

Logical Switch and Logical Network

Hello All...................I have Hyper-V Failover Cluster based on 5 Hosts and I am managing it with VMM 2012 R2. I was slightly confused with respect to Logical Network and Logical Switch in the Fabric Settings. I would appreciate if someone could
shed a little light on the difference between them. Also, while there is a Logical Network defined by default (Name of the Virtual Switch of Hosts), there is nothing defined in the Logical Switch. Which one is mandatory? Logical Network or Logical
Switch? Can I delete the default Logical Network?

Hi Nick,
Please find below link for the whitepaper mentioned by Kristian.
https://gallery.technet.microsoft.com/Hybrid-Cloud-with-NVGRE-aa6e1e9a
For a complete reference please refer below series. This covers VMM 2012 SP1 but should be fine with R2 as well.
http://blogs.technet.com/b/scvmm/archive/2013/01/08/virtual-networking-in-vmm-2012-sp1.aspx
Logical Network is defined for easier management and used in Network Virtualization where as Logical switch is used to configure networking in multiple Hosts rather than creating individual Virtual switches in each host. If it were me I'll leave the
default logical network as there is no harm of doing nothing in it.
I hope this will shed some light into your situation.
Thanks,
Janaka
Janaka Rangama MCT MIEEE MBCS (Please take a moment to Vote as Helpful and/or Mark as Answer, where applicable.)

Problems with Presonus Firestudio and Logic

I am having problems with compatability with my brand new Presonus Firestudio recording interface and Logic pro 8. I am new to logic but not to home recording, and i cant understand what might be the problem. When i use the firestudio with garageband it works easily. In the garageband sound preferences there are input AND output channels that the user can define. (i.e. you can set your input channels to come from the firestudio while the output channels go to the computer speakers or headphone jacks or whatever you define it as).
From what i have seen in logic, there is only one option for your audio settings. when in preferences and under audio, there is a "device" setting in which you can define your audio device. Wheather this is input AND output for the program, i do not know. but the problem i am experiencing is that whenever i choose the firepod as the input device, no sound from logic will play from the speakers whatsoever. My first thought was that maybe ouput was going straight to the firestudio, but after plugging headphones into it this also did not work. Has anyone had success getting their firestudio to work in logic? if so let me know what settings you had to use, and how you got to moniter your input from from the firestudio via your computer.
p.s.
another WIERD problem i have run into, is that if i shut off the firestudio while logic is open, alot of times it will shut down my whole computer. i have never heard of this happening. what am i doing wrong?
thanks!

SydSeale wrote:
The new beta drivers are now here...
http://www.presonus.com/forums/showthread.php?t=3957
ah, I was hoping to find my solution here, but alas the thread is gone...
I recently bought a Macbook running Leopard, and am having difficulties with my PreSonus Firestudio Project thru Logic and Mainstage. I can get audio input and output just fine, but there's a ton of distortion/crackle. Kickstarting the sample rate seems to clear it up for a minute or two, but then the crackle comes back. The recorded tracks sound clean if I unplug the Firestudio, so apparently it's only in the monitoring stage?
On the PreSonus board, they're claiming it's Apple who needs to update drivers for Leopard; PreSonus says the "Firestudio Project is Leopard compatible."
still searching for some answers...

Difference between RAC and MySQL Cluster !

Difference between RAC and MySQL Cluster
Please write me in well explanation , with examples , needed useful link and all other stuffs.
(1)Italian dealers/distributors for MySQL
(2)Difference between RAC and MySQL Cluster
(3)Pricing about MySQL and PostgreSQL
(4)How and which type / Way to deliver support by MySQL
(5)Security features about MySQL Vs Oracle
(6)Management Console
MySQL Vs Oracle
Thanks in advance !
MySQL Cluster

Ha ha, most amusing.
I suggest you try googling for answers to these things. This is a site dedicated to the Oracle database, the questions are answered by volunteers (not Oracle employees) and we are primarily geeks rather than marketing droids. If you have a specific Oracle question please feel free to post anytime.
Thank you for your interest.
Arrivederci, APC

Rac and logical dataguard Oracle9i

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